The difference between the two acute angles of a right angled triangle is 2pie /5 radians . Express the angle of the triangle in degree and grade .

Answer 1

well, the two angles add to pi/2, so if x is the smaller angle,

x + (x+2pi/5) = pi/2
2x = pi/10
x = pi/20

So, the two angles are pi/20 and 9pi/20

Answer 2

A wheel makes 180 revolutions in 1 minute , through how many radians does it turns in 1 seconds

Answer 3

180rev/1min * 1min/60s * 2π rad/rev = 6π rad/s